Non-ferrous

Question 1

What are the advantages of titanium

Answer 1

Strong
Light weigh 
Strength to weight ratio 
Heat resistance 
Corrosion resistance

Question 2

What are the disvantages of titanium

Answer 2

Dust ignites
Need to cut with sharp tools
Colbolt still

Question 3

What is titanium used for

Answer 3

Cooler section of gas turbine engines

Question 4

Advances of aluminium

Answer 4

3 times light than steel
Produced in cast form
Corrosion resistance

Question 5

Disadvantages of aluminium

Answer 5

Course grain structure
Brittle
Too malleable

Question 6

What is the 1st digit in aluminium alloy

Answer 6

Majority alloying element

Question 7

What is the 2nd digit in aluminium alloy

Answer 7

Any modification

Question 8

What is the last 2 digits in aluminium alloy

Answer 8

Any other alloying elements

Question 9

What alloying element are not heat treatable

Answer 9

Copper and zinc

Question 10

What is 1

Answer 10

Aluminium

Question 11

What is 2

Answer 11

Copper

Question 12

What is 3

Answer 12

Manganese

Question 13

What is 4

Answer 13

Silicon

Question 14

What is number 5

Answer 14

Magnesium

Question 15

What is 6

Answer 15

Magnesium and silicon

Question 16

What is 7

Answer 16

Zinc

Question 17

What is 8

Answer 17

Tin

Question 18

What is work hardening

Answer 18

known as strain hardening or cold working, is the strengthening of a metal by plastic deformation
Used for non heat treatable aluminium alloys

Question 19

Annealing

Answer 19

procedure for aluminium alloys consists of heating the alloys to an elevated temperature, holding or soaking them at this temperature for a length of time
Then cooled slowly
Leaves in condition for cold working

Question 20

Solution heat treatment

Answer 20

heated in either a molten sodium or potassium nitrate bath or in a hot-air furnace. The temperature is then held to within plus or minus 50°C, long enough for the copper to be taken into the solid solution with the aluminium matrix
Metal removed and quenched with 10 seconds

Question 21

Cold working

Answer 21

will cause the copper to precipitate at grain boundaries and harden the alloy.

Question 22

Natural age Harding

Answer 22

willoccuratroomtemperatureandistheprocess by which the copper precipitates at the grain boundaries, this hardens the aluminium to full strength over a period of several days.

Question 23

Artificial ageing or precipitation hardening

Answer 23

temperature is raised to between 1200C and 1900C, depending on alloying element, this increases the precipitation hardening process and also raises the final strength of the alloy

Question 24

What has no quench

Answer 24

Annealing

Question 25

F

Answer 25

As fabricated

Question 26

I

Answer 26

Annealing

Question 27

H

Answer 27

Strain hardening

Question 28

W

Answer 28

Solution heat treated

Question 29

T

Answer 29

Heat-treated to produce stable tempers other than F, O, or H

Question 30

T3

Answer 30

Solution heat-treated and cold worked.

Question 31

T4

Answer 31

Solution heat-treated and naturally aged

Question 32

T2

Answer 32

Annealed

Question 33

T6

Answer 33

Solution heat-treated and artificially aged.

Question 34

Magnesium properties

Answer 34

Highly susceptible to corrosion
Difficult to work with
Highly flammable

Question 35

What fire extinguisher to use in magnesium

Answer 35

Dry powder
Helium
Argon
Sand

Question 36

Glare

Answer 36

Glass reinforced laminate

thin layers of metal sheet and uni-directional fibre layers embedded in an adhesive system. Glare is an optimised FML for aircraft and consists of alternating layers of aluminium and glass fibre pregreg layers.

Question 37

Advantage of glare

Answer 37

• High strength
• Fatigue resistant
• Damage tolerant
• Impact and blast resistant
• Fire resistant
• Thermal isolation

Question 38

Where is glare used

Answer 38

Blast resistance cointainer
Cargo floors and liners
Leading edges